Anyone knows what is this box on the photo? I can't find anything on the manual.

Sentra undercarriage

(Photo is from a newer version, but it's the same as in mine)

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    Owner's manual rarely give detailed info on emissions equipment and/or their location. However, service manuals do since they're written for trained dealer mechanics and technicians.
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    Commented Sep 8, 2023 at 18:25

1 Answer 1


That's the evap canister. It contains charcoal to absorb fumes from your gas tank and reduce air pollution.

You can see another view of it here: https://www.youtube.com/watch?v=5m2aHdW1EqM

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